What is the prevalence of gestational diabetes mellitus (GDM)?

Updated: Apr 29, 2020
  • Author: Thomas R Moore, MD; Chief Editor: George T Griffing, MD  more...
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Abnormal maternal glucose regulation occurs in 3-10% of pregnancies, and gestational diabetes mellitus (GDM), which is defined as glucose intolerance of variable degree with onset or first recognition during pregnancy, accounts for 90% of cases of diabetes mellitus (DM) in pregnancy. However, the rising prevalence of diabetes mellitus—21 million people (7% of the population) have some form of diagnosed diabetes [9] ; another 6 million people may be undiagnosed [10] —particularly type 2 among women of childbearing age in the United States, has resulted in increasing numbers of pregnant women with preexisting diabetes. Currently, type 2 diabetes mellitus accounts for 8% of cases of diabetes mellitus in pregnancy, and preexisting diabetes mellitus now affects 1% of all pregnancies. [1, 2]

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